Permutation padlock



April 17. 1928.

1,666,453 G. E. B. JAKOPETS PERMUTATION PADLOCK Filed Feb. 28, 1927 SShGGtS-ShGGt 2 7a- 9b s2 Eli??? 4/ 6 INVENTOR.

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April 17. 1928.

. G. E. B. J AKOPETS PERMUTATI 0N PADLOCK Filed Feb. 28, r 3 Sheets-Sheet 3 AT ORNEY};

Patented Apr. 17, 1928.

UNITED STATES y 6 2 PATENT OFFICE.

ammo E. B. .mxorn'rs, or cmoaeo, rumors, assreuon some]: summon cmcae umors.

rmmu'm'rron new:

Application filed February 25, 1927. 1 Serial no; 171,854."

locks and has for its primary object to pro vide a lock of'the padlock type including a If shackle with a series of rotatable permutation tumblers controlling the operation of the latch bolt for holding the shackle in locked position.

A further objectof the invention is to provide a permutation lock of the'above type wherein the latch bolt associated with the shackle is surrounded by a plurality of rotatable tumblers with the operation of one tumbler effecting sliding movement of the latch bolt to free the same from engagement with the side legs of the shackle when the remaining tumblers have been rotated to' predetermined positions to permit sliding movement of the latch bolt.

to provide a pawl and ratchet mechanism for each rotatable tumbler whereby the position of the rotatable tumblersthat permit sliding movement of the latch bolt may be determined by the sound of. the operation of the pawl and ratchet mechanism so that the lock combination can be solved 'in darkinat'ter more fully described, shown in the accompanying drawings and claimed.

Figure 2 is a longitudinal sectional view showing the rotatablepermutation tumblers enclosing the latch bolt with the latter engaged with the ratchet teeth upon the sid legs of the shackle;

Figure 3 is a longitudinal sectional view taken on line 3,3 of Figure 1 showing the latch bolt engaged with the shackle legs;

on Figure 4 is a cross-sectional view taken latch-bolt disposed within the barrel;

A still further object of the invention is stood. the same-consists in the novel form, combinationand arrangement of parts here- In the drawings wherein like reference pn line 4-4 of Figure 2 through one of the *irotatlon tumblers showing thebarrel upon 1 which the tumblers are rotated and. the

Figure 5 is..a cross-sectional view takenon line 55 ofFigu-re-2 showing the ratchet plate or disk interposed between adjacent tumblers and interlockingly engaged with the barrel inwhich the latch bolt ismounted F1gure6 is a cross-sectional view taken on 05 line 6-6 of Fig. 2 showing the circular se-.

ries of ratchet sockets formed in one end wall of the rotating tumbler;

Figure 7 is a side elevational view' of the latch bolt removed from the lock structure;

Figure 8 is a side elevational view of the barrel that supports the latch bolt'and removed from the lock structure; 4 I Figure 9- is a cross-sectional view taken on line 99 of Figure 8 showing the dl1 ametrically opposite lugs carried. by the bar rel, the longitudinal slot in one side of the barrel and the groove .in the other sideof the barrel with which the ratchet disks are interlockingly associated;

' Figure 1O is a developed perspective view showing the' several rotatable tumblers, .ratchet disks and end blocks for the shackle legs and the, relative positions of the sev-" eral parts;

' Figure 11 is a? perspective view .of the latch bolt; and a Figure 12 is aperspective view of the latch bolt barrel.

In describing the invention in detail, it will be preferable to begin with'the assembly of the ditferentelements of the lock mecha nism and-as shown more clearly and in detail in Figures 8, 9 and 12, there is illustrated the barrel .1 of tubular formation having reduced ends 2' and 3, the reduced end 3 being externally threaded Jfor purposes presently to appear while the reducedend 2 is diametrically notchedas at 4. One side wall of the'bar'rel 1 is cut awayto provide a longitudinally extending slot 5v extending through the end 2 of the barrel and having its other end terminating inwardly of the reduced'threaded end 3-, the slot 5 being alined with one of the notches 4. The outer side of theb'arrel 1 diametrically opposite the slot 5 is provided with a longitudinally extending groove 6 at its outer side. Three pairs of diametrically oppocarried by the barrel 1 and are located at a radius of 90 from the slot 5 and roove 6, the lugs 7 upon one side of the arrel 1 being of a width slightly greater than the oppositely disposed lugs 8 while all of of said lugs are of the same length, this idea face roughened or knurled to facilitate ro tation and said tumbler block has an axial bore 11 extending through the same'to be received on the barrel. An annular groove 12 is formed in the wall of the bore 11 in wardly of the opposite side faces of the tumbler block while the opposite walls of the bore 11 between the bore 12 and outer faces of the tumbler block are provided with notches 7 and 8 that are of widths comparable to the width of the lugs 7 and 8 upon the barrel 1. The peripheral faces of the tumbler blocks 9 carry permutation characters in the form of numerals 13, it being observed from an inspection of Figure that the zero figure on the three tumblers 9, 9

and 9" are alined with the larger notch 7. The side faceof each of the tumbler blocks 9 to 9inclusive opposite the flanged edge ,10 is provided with a circular series of spaced ratchet recesses 14, two of the recesses 14$ being arranged in closer proximity than the other recesses and in proximity of the zero character 13 upon the periphery of each tumbler block. Also, the recesses 14 are in proximity of notch '7 upon the tumbler blocks 9,9 and 9* while the tumbler block 9 that has but a single notch 15 has said notch 15 disposed adjacent the permutation charester 5. Each of the tumbler blocks 9 9 and 9 has an annular recess 16 formed in the side-thereof opposite the ratchet recesses 14 for purposes that will now appear.

The tumbler block 9 is first placed upon the barrel 1 and being placed over the reduced threaded end 3 or the barrel as th notches 7 and 8 alined with the respective lugs l and 8 upon opposite sides of the barrel and moved over said barrel until the lugs 7 and 8 adjacent the reduced end 2 of the barrel are disposed-in theannular groove 12 within the tumbler block 9 and'at which time a quarter turn revolution of the tumbler block to place the notches 7 and 8? from registration with the lugs 7 and 8 and dispose the notch? in alinement with the slot 5 at one side of the barrehand when so disposed the zero character 13 will be disposed directly over the slot 5.

The ratchet dish 17 having a central openmamas ing 18 is then mounted on the barrel 1 and said disk as shown in Figures 5 and 10 has three notches 19, 20 and 21 formed in the wall of the opening 18 and arranged apart as illustrated while the wall of the opening 18 opposite the notch 21 carries an inwardl directed finger 22. A spring finger 23 is cut out from the peripheral edge of the ratchet-disk 17 between the notches 20 and 21 and said notches are so disposed so as to freely pass over the lugs 7 and 8 upon the, barrel while the finger-22 extends into the barrel groove 6 to hold the ratchet disk nonrotata-ble on the barrel. The; spring finger 23 has its-end ofi'set as shown in Figure 10 and extends in a direction toward the ratchet recesses 14 in the block 9 with which it is associated. The second tumbler block "9 is then mounted upon the barrel 1 in a manner similar to the tumbler block 9 and the ratchet disk 17 is seated in'the recess 16 of the tumbler block 9* so that the adjacent faces of the tumbler blocks 9 and 9? have abutting relations as shown in Figures 2 and 3. The tumbler block 9 is also mounted upon the barrel 1 in a like manner with the ratchet disk 17 disposed between the tumbler blocks 9 and 9 and in the assembly so far described, the three pairs of lugs 7 and 8 upon the barrel 1 are disposed within the annular grooves 12 in the tumbler blocks 9, 9 and 9*. In the arrangement so far described, the notches 7 are aligned with the slot 5 while the notch 21 upon the ratchet dish 17 is also alined with said slot. The latch bolt 2d shown in detail in Figures 7 and 11 is then inserted in the barrel 1. F

The latch bolt 24; comprises a shank having a rectangular loop head 25 upon one end thereof with a beveled latch block 26 set into 1 the loop head and extending inwardly from the outer end as shown. The side rib 2? extends longitudinally of the shank of the latch boltand said rib carries tour outwardly directed lugs equidistantly spaced, three of the lugs being designated'by the reference numeral 28 while the other lug is indicated at 29 The latch bolt 24- is then inserted in the barrel 1 and the rib 27 extends through the side slot 5 of the barrel and when the latch bolt is fully inserted, the lugs 28 are in the same plane as the lugs 7 and 8 upon the barrel, the lug 29 upon the latch bolt projecting outwardly of and beyond the, tumbler block 9*. It being understood that ing a cam groove 30 as shown in Figures 2 and 3 has the single notch 15 thereof passed till over the lug 29 upon the latch bolt to dis- I pose said lug in the cam groove. The end of the latch bolt opposite the loop head 25 is beveled as at 31 and extends b yond the red'uced threaded end 30f the-barrel while the reduced end 2' of the barrel at the cut away portions 4embrace opposite sides of. the loo head-26 of the latch bolt.

The, end blocks 32- and 33 are then mount ed upon the opposite ends of thelatch bolt andbarrel, the block 32 having a rectangular opening '34, to receive the headed end with the opening in the latch head 24 traversing the opening 34. The other block 33 has a facial recess 36 that receives the ratchet disk 17 and is further provided with an internally threaded bore 37 that engages the reduced threaded'end 3 of the barrel 1, the block 33 further having, a. transversely extending opening 38 completely therethrough as shown in Figure 2. When the end blocks 32 and 33 are assembled on the latch bolt and barrel. thetransverse openings and 38 extend in like directions as shown in Figures 1 to-3.

The shackle 39 associated with the lock structure comprises side legs 40 and .41 that areinserted in the openings 35 and 38 respectively, the leg 40 of the shackle being longer than the leg 41 and having a head 42 upon its end to prevent complete removal of the shackle from the lock structure. The outer side of the shackle leg 40 is provided with ratchet teeth 43 while the inner side of the leg 41 is provided with ratchet teeth 44. the beveled end 31 upon the'latch bolt- 24 engag ng the ratchet teeth 44. upon the inner side of the shackle leg 41 while the ratchet ,teeth 43 upon the outer side of the shackle leg 40 are engaged bv the latch bolt 26 within the loop head25 of the latch bolt.

WVith the tumblers in the positionas described upon thebarrel 1 and latch bolt 24, the zero characters upon the permutation tumblers 9'. 9' and 9 are in alinement as shown in Figure 1 and register with the indicator marks 45 upon the end blocks 32 w and the tumbler 9 has been rotated to cause the" permutation character 5 to be alined with zero characters upon the other tumblers and also the indicator marks 45 .and during such rotation of the tumbler 9,

the cam groove 30 cooperating with the lug 29 upon the latch bolt 24 axially shifts the latch bolt to disengage opposite ends of the latch bolt from the side legs of the shackle leg 39 and at which time the leg 41 of the shackle is displaced from the end block 33 for opening movement of the shackle, such movement; being limited byzgithe' head 42 upon the end of theleg 40.. Upon a reverse operation of the tumbler 9 the latch bolt 24is axially shifted in the opposite direc -tion to become engaged with the ratchet teeth upon the shackle-legs 40 and 4l. .When.

the tumblers 9, 9' and- 9" are rotated to displace the notches 7 out of registration with the slot 5 and lugs 28 upon the latch bolt, it is impossible for the tumbler 9 to axially shift the latch bolt to its released position as the lugs 28 abut the side walls of the annular grooves 12 in said tumbler blocks. An audible sound is provided upon rotation of the several tumbler blocks occasioned b the spring finger 23 of each ratchet disk 1 be- "ing engaged in the ratchet sockets 14 of the several tumblers and when the ratchet notches 14 are engaged by the spring finger, it has been determined that the tumbler Is then in its latch bolt releasing position so that one having the knowledge of this feature of the lock will not have to observe the permutation characters in moving the "several tumblers to their latch bolt releasing positions.

From the above detailed description of the inventon, it is believed that the construct'on and operation thereof will at once be.

barrel between the end blocks, a shackle having legs slidably passing through. the end b ocks and engaged with the opposite ends of the latch bolt and one of said tumblers cooperating with the latch bolt for axially shifting the same to disengage the latch bolt from the shackle legs.

2. In a permutation padlock of the character described. abarrel, a latch bolt slid able therein. end blocks supporting the barrel and latch bolt. rotatable tumblers on the barrelbetween the ends blocks, a shackle having legs slidably passing through the end blocks and engaged with the opposite ends of the latch bolt and one of said tumblers cooperating with the latch bolt for axially shifting the same to disengage the latch bolt from the shackle legs, the connection between the lastnamed tumbler and latch bolt including a cam groove formed in the tumbler and a lug on the latch bolt extending into the groove. 7 a

3. In a permutation padlock ofthe character described, abarrel, a latch bolt slid vfrom the shackle legs,-the other ones of said tumblers having annular grooves formed in the walls ot the bores thereof, lugs on said latch bolt extending into the annular grooves and the s'de wall of said tumblers being notched with the several notches to be alined with the latch bolt lugs to permit shifting movement of the latch bolt.

4. In a permutation acter described, a barre a latch bolt slidable therein, end blocks supporting the barrel and latch bolt, rotatable tumblers 0n the barrel between the end blocks,'a shackle having legs passing through the end blocks and engaged with the opposite endsof the latch bolt and one of said tumblers cooperating with the latch bolt for axially shifting the same to disengage the latch bolt from the shackle legs, the other ones of said tumblers having annular grooves formed in the walls of the bores thereof, lugs on said latch bolt extending into the annular grooves and the side wall of said tumblers being notched with the several notches to be alined with the latch bolt lugs to permit shitting movement of the latch bolt. a disk having a ratchet finger nonrotatable on the barrel between adjacent tumblers and there being acircular series of ratchet sockets in one side of each tumbler to be engaged by the ratchet finger and two of saidratchet sockets being in closer relationship than the other sockets with said two sockets in proximity of the tumbler notch whereby the sound of the ratchet finger passing over the two notches determines the position of the tumbler notches relative to the latch bolt lugs.

5. In a permutation padlock oi the charv acter described, a barrel, a latch bolt slidable therein, end blocks supporting the bare rel and latch bolt, rotatable tumblers on the barrel between the end blocks, a, shackle having legs passing through the endblocks and engaged with the opposite'ends of the latch bolt and one of said tumblers cooperating with the latch bolt for axially shifting the same to disengage the latch bolt from the shackle legs, the connection between the last named tumbler and latch bolt including a cam groove formed in the tumbler and a lug on the latch bolt extending into the groove, the other ones of said tumblers having annular g'roovesformed in the walls of the bores thereof, lugs on said latch bolt extending into the annular grooves and the side wall of said tumblers being notched with the several notches to be alined with the latch bolt lugs to permit shifting movement of the latch bolt, a disk having a ratchet finger nonrotatable on the barrel be adlock of the char- I neonate tumbler notch whereby the sound of the ratchet finger passing over-the two notches determines the. position of the tumbler notches relative tothe latch bolt lugs.

6. In a permutation padlock of the character described, a barrel, alatch bolt slidable therein, end blocks supporting the barrel and latch bolt, rotatable tumblers on the barrel between the end blocks, a shackle having legs passing through the end blocks and engaged with the opposite ends of the latch bolt and one of said tumblers cooperating with the latch bolt for axially shifting the same to disengage the latch bolt from the shackle legs, the other ones of said tumblers having annular grooves formed in the-walls of the bores thereof, lugs on said latch bolt extending into the annular grooves and the side wall of said tumblers being notched with the several notches to be alined with the latch bolt lugs to permit shifting movement of the latch bolt, permutation characters on the peripheries of the rotatable tumblers,-predetermined ones of said characters being alined with indicator marks on the end block 7 when the notches in the tumblers are alined with the latch bolt lugs, a disk having a ratchet finger nonrotatable on the barrel between adjacent tumblers and there being a circular series of ratchet sockets in one side of each tumbler to be engaged by the ratchet finger and two or said ratchet sockets being in closer relationship than the other socket with said two sockets in proximity of the tumbler notch whereby the sound of the ratchet finger passing over the two notches determines the position of the tumbler notches relative to the latch bolt lugs.

7. In a permutation padlock of the character described, a barrel, a latch bolt slidable therein, end blocks supporting the barrel and latch bolt, rotatable tumblers on the barrel between the end blocks, a shackle having legs passing through the end blocks and engaged with the opposite ends of the latch bolt and one of said tumblers cooperating with the latch bolt for axi lly shifting the same to disengage the late bolt from the shackle legs, the connection between the last named tumbler and latch bolt including a cam groove formed in the tumbler and a ug on the latch bolt extending into the groove, the other ones of said tumblers having annular grooves formed in the walls of the bores thereof, lugs on said latch bolt extending into the annular grooves and the side wall of said tumblers being notched with the several notches to be alined with the latch bolt lugs to permit shifting movement of the latch bolt, permutation characters on the per ph- Ell till) cries of the rotatable tumblers, predetermined ones of said characters bein alined with indicator marks on the end bloc s when" adf'acent tumblers and there being a 'cir finger nonrotatable on. the barrel between on ar series of ratchet sockets in one side of each tumbler to be engaged by the ratchet finger and two of said ratchet sockets being in closer relationship than the other sockets with said two sockets in proximity of the tumbler notch whereby the sound of the ratchet finger passing over the two notches determines the position of the tumblers relative to the latch bolt lugs.

8. In a permutation padlock of the character described, a barrel, a latch bolt slidable v therein, a plurality of tumblers rotatable on the barrel and retained against longitudinal movement thereon, end blocks suppporting the barrel and latch bolt, 21. shackle having legs with ratchet teeth extendingthrough the end blocks and engaged by opposite ends of the latch bolt, coacting means on the tumblers and latch bolt whereby the tumblersare rotatable to predetermined positions to disengaging permit sliding movement of the latch bolt to osition and another tumbler for axially shifting the latch bolt.

9. In a permutation padlock of the character described, a barrel, a latch bolt slidable therein, a plurality of tumblers rotatable on the barrel and retained against longitudinal movement thereon, end blocks supporting the barrel and latch bolt, a shackle having legs with ratchet teeth extending through the end blocks and engaged by opposite ends of the latch bolt, coacting means on the tumblers and latch bolt whereby the tumblers are rotatable to predetermined positions to permit sliding movement of the latch bolt 'to disengaging position and another tumbler for axially shifting the latch bolt, the connection between the last named tumbler and latch bolt including a cam groove in the tumbler and a lug on the latch bolt.

In testimon whereof I ailix m signature.

' YUROE. B. JA OPETS. 

